# File lib/street_address.rb, line 812
      def line1(s = "")
        s += number
        s += " " + prefix unless prefix.nil?
        s += " " + street unless street.nil?
        s += " " + street_type unless street_type.nil?
        if( !unit_prefix.nil? && !unit.nil? )
          s += " " + unit_prefix 
          s += " " + unit
        elsif( unit_prefix.nil? && !unit.nil? )
          s += " #" + unit
        end
        s += " " + suffix unless suffix.nil?
        return s
      end